These parameters are applicable only to Round brilliant cut. |
2R roundness
2*radius roundness_<angle> is the doubled maximum difference of girdle radius values within the sector of <angle> degrees.
The maximum absolute difference of radius measurements within the sector of <angle> degrees is considered. The maximum of this value over all directions, multiplied by 2, is the 2*radius roundness (<angle>).
ReportingReported in | Section | Values | Units | Bookmarks |
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|
Detailed Parameters | Measured at 11.25° | mm | NA |
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Full Report for Brilliant | Measured at 15° |
Both %(diameter) and grades (EX, VG, etc.)
| RADIUS_ROUNDNESS_PC_1 , RADIUS_ROUNDNESS_SYM_1
|
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Measured at 22.5° | RADIUS_ROUNDNESS_PC_2 , RADIUS_ROUNDNESS_SYM_2 | Measured at 30° | RADIUS_ROUNDNESS_PC_3 , RADIUS_ROUNDNESS_SYM_3 | Measured at 45° | RADIUS_ROUNDNESS_PC_4 , RADIUS_ROUNDNESS_SYM_4 | Measured at 90° | RADIUS_ROUNDNESS_PC_5 , RADIUS_ROUNDNESS_SYM_5 | Overall | Grade | RADIUS_ROUNDNESS_SYM |
The Appraiser Editor, Symmetry tab, contains just the values measured at 11.25°, 22.5°, 45°, and 90°, denoted 2RRoundness_<angle>. |
Diameter roundness
Diameter roundness at <angle> is the difference of girdle diameters between the directions at an angle of <angle> degrees.
Diameter is measured in two directions at an angle of <angle> degrees and the absolute difference of these measurements is considered. The maximum of this value over all directions is the Diameter Roundness (<angle>).
ReportingReported in | Section | Values | Units | Bookmarks |
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Full Report for Brilliant |
Detailed Parameters | Measured at 15° |
Both %(diameter) and grades (EX, VG, etc.)
| DIAMETER_ROUNDNESS_PC_1 , DIAMETER _ROUNDNESS_SYM_1
|
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Measured at 22.5° | DIAMETER _ROUNDNESS_PC_2 , DIAMETER _ROUNDNESS_SYM_2
| Measured at 30° | DIAMETER _ROUNDNESS_PC_3 , DIAMETER _ROUNDNESS_SYM_3
| Measured at 45° | DIAMETER _ROUNDNESS_PC_4 , DIAMETER _ROUNDNESS_SYM_4
| Measured at 90° | DIAMETER _ROUNDNESS_PC_5 , DIAMETER _ROUNDNESS_SYM_5
| Overall | Grade | DIAMETER _ROUNDNESS_SYM
|
This parameter is not featured on the MyAppraiser panel. |